package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String code = userLoginDTO.getCode();
        String  openid = getOpenid(code);
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.getByOpenid(openid);
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .build();
            userMapper.insert(user);
            return user;
        }else{
            return user;
        }
    }
    private String getOpenid(String code) {
        Map<String, String> paramMap = Map.of(
                "appid", weChatProperties.getAppid(),
                "secret", weChatProperties.getSecret(),
                "js_code", code,
                "grant_type", "authorization_code"
        );
        String s = HttpClientUtil.doGet(WX_LOGIN_URL, paramMap);
        JSONObject jsonObject = JSON.parseObject(s);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
